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AW3642CSR

High Efficiency, 1.5A Flash LED Driver

The AW3642 is a LED flash driver that provides a high level of adjustability within a small solution size. The AW3642 utilizes a 2MHz or 4MHz fixed-frequency synchronous boost converter to provide power to the 1.5A constant current LED sources. The 64 levels current source provides the flexibility to adjust the current of LED in Flash/Torch/IR modes. The AW3642 provides three IVFM protection modes to prevent system reset or shutdown under low battery condition. The AW3642 is controlled via an I 2 C-compatible interface. The main features of the AW3642 include: flash/torch current, flash timeout duration, IVFM, TX interrupt. The AW3642 also provides hardware flash pins (STROBE) to control flash events. The 2MHz or 4MHz switching frequency options, overvoltage protection (OVP), and adjustable current limit allow for the use of tiny, low-profile inductors and 10-µF ceramic capacitors. The device operates over a –40°C to +85°C ambient temperature range.

Characteristic

l  1.5A Accurate and Programmable LED Current Source

n  Flash:23.4mA~1.5A64 levels 23.44mA/level

n  Torch:5.4mA~376mA64 levels 5.88mA/level

n  Flash Timeout40ms~1.6s16 levels

n  Flash/Torch/IR Mode

l  High Efficiency: 85%

l  Optimized Flash LED Current During Low Battery Conditions (IVFM)

l  Hardware Strobe Enable (STROBE)

l  Synchronization Input for RF Power Amplifier Pulse Events (TX)

l  400kHz I2C:AW3642I2C Address=0x63

l  0.5mm Pitch, CSP-9 Package


Datasheet

Application note

Title Type Size Date Download
DS_AW3642_EN_V1.4_High Efficiency, 1.5A Flash LED Driver.pdf PDF 1.5M 2019-01-11
  • LED Channel
    Control Interface
    Flash Current (Max) (A)
    Torch Current (Max) (A)
    Flash Current Accuracy (%)
    Flash Timer (s)
    Indicator mode
    Type
    Package (mm)
  • AW3642CSR

    1
    I2C
    1.5
    0.376
    ±7
    0.04-1.6
    -
    Boost
    WLCSP 1.63X1.33-9B
  • AW3648CSR

    1
    I2C
    1.5
    0.376
    ±7
    0.04-1.6
    -
    Boost
    WLCSP 1.626X1.332-12B
  • AW36428FCR

    1
    I2C
    1.5
    0.375
    ±10
    0.04-1.6
    -
    Inductorless
    FCQFN 1.6X1.2-10L
  • AW36528FCR

    1
    I2C
    1.5
    0.375
    ±10
    0.04-1.6
    Inductorless
    FCQFN 1.6X1.2-10L
Package form Number of pins Long(mm) Width(mm) Thick(mm) Pin spacing(mm) Heat sink Package drawing
WLCSP 1.63×1.33×0.575-9B 9 1.63 1.33 0.575 0.5 N
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